I have a Commodore A690 (A570 prototype) sideloaded CD-ROM drive that I would like to run with my Vampirized A500. When connected, the machine does not boot at all. Just a blank picture. Swapping out the Vampire for an M68000 lets me boot it up, so the drive is indeed working. Is this a known problem? Do you need me to extract some pieces of information from my system in order for you to be able to add support for it?